How do I access values in a nested dictionary in Python?

How do I access values in a nested dictionary in Python?

You can access values in a nested dictionary by chaining the keys. For example, if you have data = {'a': {'b': 1}}, you can access the value with data['a']['b'].

What if the keys are dynamic or stored in a list?

You can loop through the list of keys to access the value. For example, if you have keys = ['a', 'b'], you can do value = data[keys[0]][keys[1]].

Can you give me an example with a more complex dictionary?

Sure! Consider data = {'x': {'y': {'z': 42}}}. You can access 42 with data['x']['y']['z'].

What if a key doesn't exist?

You can use the get method to avoid errors. For example, data.get('x', {}).get('y', {}).get('z', 'default') will return 'default' if any key is missing.